【摘要】 提出了一种基于混合域牛顿插值的错误掩盖方法,分别在时域和空域进行插值获得两个运动矢量,通过建立插值系数表构造混合的插值模型,获得双域插值的运动矢量,通过最优运动矢量判断得到最后的错误隐藏运动矢量.实验证明,由于充分利用了时域和频域的信息冗余,在10%网络丢包率的环境下平均峰值信噪比比空域拉格朗日插值方法高0.3~0.8 dB.更多还原

【Abstract】 An error concealment algorithm for H.264 using Newton interpolation in the hybrid field is presented.Two motion vectors are obtained by interpolation in the spatial field and in the temporal field.A hybrid interpolation model is constructed to get the optimal motion vector of the lost motion vector by setting up a table for interpolation coefficients and judging with boundary match algorithm.Simulation results show that this scheme can highly improve the quality of reconstructed video and obtain a gain of about 0.3^{0.8 dB} in PSNR,compared with Lagrange interpolation in the spatial field under the condition of Packet Loss Rate with 10%.更多还原